Hose coupling



Sept. 14, 1943. F. E. sMnTH HOSE COUPLING Filed Aug. 12, 1942 ATTOBNEKS.

vor semi-resilient material.

Fflifkli Eliahl Sfnith England if f- FAppliafition Angustia, 1942,-sria11 N 1454;525 n l lln'Great-Britain Aprill 1941 l y claims. (pg. 2815-1- i) This Yinvention relates to hosecouplings; and is especially applicable to fire hose, in whichv it is desirablevthat sectionsv ofi hose pipe should be capable of being quicklyI and easily joined tofr gether'in asecure and watertight manner.'

Accordin'gtothe invention the coupling parts" of two pipes which are to be joined are both made of bulbous form, that is, spherical, oval, or of similar shape, the bulbous member of one pipe, which may be called the spigot, being adaptedto pass under compression into the bulbous member of the other pipe, which may be called the socket, and there to recover its original shape. The spigot may consist of resilient material such as rubber, and is adapted to be pressed into the socket, in enteringr which it is compressed, and then expands to ll thev hollow interior of the socket, which latter may be made of non-resilient The use of rubber is not essential, as both engaging members of the coupling may consist of hose fabric, and in that case the spigot member may berubber-lined to prevent percolation. The spigot may have a tubular extension to pass beyond the bulbous cavity of the socket, and the neck or portion of the spigot behind its bulbous portion may havel a ring or collar formed on or secured to it, to act as a stop to ensure correct location of the bulbous portion inside the bulb of the socket. The nose of the socket may also have a collar, ring, or washer of hard material against which rthe collar of the spigot abuts, and which resists expansion under internal pressure. The spigot may be provided with'one or more ribs .and theA socket with a counterpart groove or grooves, either circumferential or oblique, which assist in holding the two partsV rmly together, the ribs consisting of a resilient material which gives way when the spigot is pushed into the socket, and springs into interlocking position when the full "A andi-B indicatetwopipes to be joined,\the water or other Aiuid under pressure beingassumed toi-travel in tl'ie. direction indicated by the arrows. Thepipe'Ais formed or provided with a resilient bulb'C andA at fits-'extremity with ,anle'xtension D projecting into'the (pipe B `The' "pipe-coupling member-B basant enlargement E of non-resilient orffsemilresilient material'fin `whieh the; 'bulbYV `C A abuts against a bead or collar G (Figure 1) of hard material on the open end of the enlargement E.

Each section of thepipe is made with or atl l tached to a resilient bulb C at Aone end and a bulb 'of which are perpendicular to the axis ofthe spigot, while the fronts of the said ribs are inpenetration is accomplished. The chief function of the rib is to facilitate rm engagement while -the hose is deflated, and to prevent the coupling clined. A collar H of metal or other hard material is formed with corresponding recesses to receive thesaid ribs,` thenarrower part of the said collar being secured by wires J at the front of the bulb member E,.or tightened on by clamps or in any other convenient manner. The form of the ribs-as shownr facilitates their giving wayL during the insertion'of the spigot and rising to resist displacementwith their flat rear sides after insertion. which carry the respective bulbs can be secured tov the main lengths M and M of the hose pipes by any convenient means, for example by metal sleeves N, N', roughened on their outer surfaces,

. against which the-hose fabric is gripped by wires P, P'; wrapped tightly around the hose fabric. Alternatively, themain lengths of pipe may be arranged'to overlap the outer end of the cylinldrical tubular part B of the coupling head as `shown atM in Figure 1 and cemented, wired, clamped, or otherwise suitably secured tothe The assemblingof the joint can be very easily and rapidly eected, and when in use to carry a stream of water or other iluid under pressure, the kinetic energy of the stream is utilised to press the bulb of ther spigot against the interior of `the bulb of the socket, the stream exerting vpressurein all directionsagainst the inside of the bulb of the spigot, so that as the speed or pressure of the flow increases,'the resistance of -the joint to leakage also increases as theinner Thevheads of the ncoupling members 2. Meansv for separably joining together secrtions of hose pipe, wherein each section has (at one end a bulbous spigot of ,resilient material with an integral pipe portion thereon'tand at Ythe other end a bulbous socket of hardergmateriai also with an integral pipe portion on the'sarne,'

said bulbous spigot being resiliently compressible adaptedto be passed under compression'into the socket of an adjacent -section'and there to recover its original shape.

, 3. In a separable couplingfor adjacent sections of hose pipe, the combination 'of a pipe section terminatingv integrally in a bulbous enlargement with a second pipe `section terminating integrally in a vcompressible resilient bulb yadapted to be forced under pressure into said enlargement, said` resilient bulb having an exiensionin the diretev tion of the longitudinal axis of the pipe sections adapted to enter a distance into the bore of the iirst-named pipe section behind the bulb thereof.

4. A coupling as in claim 1, wherein the spigot member of the coupling is provided with parallel ribs of resilient material and the socket member is provided with counterpart parallel grooves in which the said ribs engage and interlock when full penetration of the spigot member into the socket has been accomplished, said grooves and ribs vbeing disposed in a substantially transverse direction with respect to the longitudinal axis of the spigot and socket members.

,f ,5, A hose coupling comprising a tubular couplingheadof the resilient material including a collapsible bulb terminating in an extension of reduced diameter, a collar fastened on said tubu- V. lar head behind the bulb, said collar having on its outer surface a plurality of ribs in parallel arrangement, a co-acting coupling head adapted to enclose said bulb, a second collar of hard material having a tubular shank and having on its inner surface a plurality of grooves to receive and interlock with said ribs, and a wire binding outside said last named coupling head to grip the material o f the Acoupling head against the said tubular Sha-nk. v

FRANKLIN ELIJAH SMITH. 

